FOSSBilling up to 0.7.x Serviceapikey reset isActive information disclosure

Summaryinfo

A vulnerability classified as problematic has been found in FOSSBilling up to 0.7.x. This affects the function isActive of the file /api/client/serviceapikey/reset of the component Serviceapikey. The manipulation leads to information disclosure. This vulnerability is documented as CVE-2026-53644. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in FOSSBilling up to 0.7.x. This issue affects the function isActive of the file /api/client/serviceapikey/reset of the component Serviceapikey. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

FOSSBilling is a free, open-source billing and client management system. Versions 0.5.3 through 0.7.2 allow authenticated clients to both read and reset API key service secrets for orders that are no longer in an `active` state (e.g., `suspended`, `canceled`). The root cause is missing order-state validation in two client API endpoints, despite an `isActive()` helper already existing in the `Serviceapikey` module and the frontend UI correctly gating access on `order.status == 'active'`. Version 0.8.0 contains a fix. Some workarounds are available. If the `Serviceapikey` module is not needed, uninstall it to remove the affected endpoints. One may also use a reverse proxy or WAF to restrict access to `/api/client/order/service` and `/api/client/serviceapikey/reset` based on application-level order-state logic.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-53644 since 06/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 0.8.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-41969). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Billing Software

Name

• FOSSBilling

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7

Website

• Product: https://github.com/FOSSBilling/FOSSBilling/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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